This LTPP Protocol covers the procedures for determining the flexural creep stiffness of asphalt binders using a bending beam rheometer (BBR). The test shall be carried out in accordance with AASHTO T313-02 as described by the following.

12. PROCEDURE

12.1 Select the test temperature based upon the laboratory testing plan designed for the individual SPS project. After demolding, immediately place the test specimen in the testing bath and condition it at the testing temperature for 60 ± 5 minutes.